EMP is funded through the Horizon2020 programme of the European Commission.
Selected Publications

A phononic crystal coupled to a transmission line via an artificial atom

Aleksey N. Bolgar, Daniil D. Kirichenko, Rais. S. Shaikhaidarov, Shtefan V. Sanduleanu, Alexander V. Semenov, Aleksey Yu. Dmitriev, Oleg V. Astafiev

The interaction of superconducting qubits with surface acoustic wave resonators in quantum regime has been achieved recently. It opens a new field of research – quantum acoustodynamics – and allows developing new types of quantum devices. The main challenge in this direction is to manufacture acoustic resonators in the gigahertz range. Here, we demonstrate that the structure of a hybrid acoustodynamic device can be significantly simplified, if we replace an acoustic resonator with a phononic crystal. Our crystal consists of narrow metallic stripes on a quartz surface. The artificial atom in turn interacts with a microwave transmission line. Therefore, two degrees of freedom of different nature, acoustic and electromagnetic, are coupled with a single quantum object. A scattering spectrum of propagating electromagnetic waves on the artificial atom visualizes acoustic modes of the phononic crystal. Our geometry allows realizing effects of quantum acoustics on a simple and compact system.

Commun Phys 3, 207 (2020)

doi: 10.1038/s42005-020-00475-2